import pymysql
class DB:
    def __init__(self):
        self.conn = pymysql.connect(host='localhost',port=3306,user='root',password='123',db='workf',charset='utf8',cursorclass = pymysql.cursors.DictCursor)
        self.cousor = self.conn.cursor()

    #添加，修改，删除
    def update(self,sql):
        self.cousor.execute(sql)
        self.conn.commit()
    #查询单个
    def find(self,sql):
        self.cousor.execute(sql)
        res = self.cousor.fetchone()
        return res
    #查询所有
    def find_all(self,sql):
        self.cousor.execute(sql)
        res = self.cousor.fetchall()
        return res
    #关闭
    def close(self):
        self.cousor.close()
        self.conn.close()
        

db1 = DB()